An experimental study on absorption of ammonia-nitrogen by acid modified zeolite

HNO3、H2SO4、H3PO4 liquors are used to modify the natural zeolite in different pH value,and also a research is made of the efficiency of removing ammonia-nitrogen by the absorption of the modified zeolite.It is confirmed that ammonia-nitrogen removal efficiency by using inorganic acid modified zeolite is influenced not only by the pH value of modifier,but also by the category of inorganic acid,and not all the inorganic acids to modify the zeolite can raise the adsorption function of ammonia-nitrogen in water.